This pack of 10 ballpoint pen refills is the perfect addition to your writing arsenal. The black ink is smooth and reliable, providing a consistent writing experience every time. These refills are compatible with cross pens and are retractable for easy use. Crafted from durable plastic, these refills will withstand the wear and tear of daily use. The package dimensions of 4" x 01" with spring make them easy to store, use, and transport. These refills are a great choice for anyone looking to keep their pens in top condition.